E. Yeh, D. Ramage, C. Manning, E. Agirre, und A. Soroa. Proceedings of the 2009 Workshop on Graph-based Methods for Natural Language Processing, Seite 41--49. Stroudsburg, PA, USA, Association for Computational Linguistics, (2009)
I. Konstas, V. Stathopoulos, und J. Jose. Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, Seite 195--202. New York, NY, USA, ACM, (2009)